Copi, Irving M. <br/><br/>
Introduction to logic / 
 eLogic  exercises in Logic  [computer file]: 
Irving M. Copi, Carl Cohen 
 - Upper Saddle River, NJ :  Pearson Prentice Hall,  2005 
 - 683 p. :  ill. (some col.) ;  25 cm. +  1 computer disc 
<br/><br/><label>ISBN: </label>0131689509 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic--Textbooks